Hyderabad:IIT,NIT,IIIT BITS pilani-Hyd, JNTU campus, OU campus.
OR CBIT,Vasavi,MJCET,Vardhaman,MGIT,Gokaraju rangaraju,Narayanamma engg college.

Kolkata: Jadavpur University
Institute of Engineering and Management groupHeritage Institute of Technology
Techno India University
Government college of Engineering and Ceramic Technology

It depends on the college you choose, some colleges in kolkata are good for computer science and engineering but there are many good colleges like IIIT Hyderabad and IIT Hyderabad are there which are really good computer science environment. So, according to my opinion, Hyderabad is better place for this. Best of luck